Purdue Research Foundation

Andrew J Zakrajsek

Eric Allen Nauman

Anne Dye Zakrajsek

Steven Forrest Son

Evan Louis Breedlove

Thomas Michael Talavage

James A Isca

Daniel J Rawson

Jonathan M Childress

A compound for protection of an object from a blast or shock wave. The compound include a matrix material and at least a first and second sets of inclusions in the matrix material that differ in size, quantity, shape and/or composition in a direction through the impact-absorbing material, the combination of which contributes to the ability of the material to exhibit at least one property that changes as the inclusions are deformed in response to a blast or shock wave.

Method of making a blast or shock wave mitigating material

Dynamic load-absorbing materials and articles

A sleeve that provides mechanical stimulation to the arm to prevent bone density loss. A primary goal of this product is to prevent bone density loss that occurs during extended space travel. For one embodiment, only the predefined frequency specifications had to be met (between 40 Hz and 60 Hz). By meeting these frequencies for a duration of 30 minutes the product will theoretically prevent the loss of bone density. Additionally, clinical trials will need to be conducted before this product can be marketed. The product includes of several mechanical vibrators attached to a sleeve. The vibrators are small unbalanced-mass motors which are similar to those found in cell phones. The motors are encased in dome shaped housings designed to reduce lateral vibrations along the arm. The product is controlled using an Arduino board attached to the sleeve that actuates the motors. The motors, in turn, provide the specified frequency to the arm for 30 minutes. The spacing of the motor housings was determined from PEA simulations. This resulted in the motors being spaced 2 in apart along the arm at 90&#xb0; increments around the axis of the arm. The controller has a display that allows for user interaction and includes a session timer. In addition, this product is contemplated for use in reducing muscle atrophy, eliminating bed sores, and treating other ailments that can result from sedentary behavior.

Therapeutic method and apparatus using mechanically induced vibration

Growing community of inventors

Lafayette, IN, United States of America

Andrew J Zakrajsek